Modem



FIG. 1 is a side perspective view of the invention in combination with a personal computer and computer interface card;

FIG. 2 is a side perspective view of the invention;

FIG. 3 is a side view of the invention;

FIG. 4 is an opposite side perspective view of the invention;

FIG. 5 is a rear perspective view of the invention; and,

FIG. 6 is an opposite side view of the invention.

The broken line showings of FIG. 1 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a modem, as shown and described. 